Deputies said the shooting happened at about 5:30 p.m. in a first-floor unit of a West Oaks apartment building on 729 Royal Lake Circle.

"When the (front) door did not open, he went around to the side of the apartment, found a window, fired some rounds into that window, breaking that window," said Orange County Sheriff’s Office Lt. Paul Hopkins.

The shooter entered the apartment through that window, ambushed two men, and then killed himself, deputies said. Two women who also lived at the apartment fled.

One of the victims, Austin Duink, 24, was pronounced dead at the scene.

"It looked like he got shot on his arm because there was a whole bunch of blood on his arm and stuff," said West Oaks resident Jerry Oliver. "I was trembling, kind of like I was thinking, 'Why would this happen? This neighborhood is nice,'" he said.

The third victim, Donovan Cope, 21, was taken to Orlando Regional Medical Center with non-life-threatening injuries.

LOCAL, LIVE, LATE-BREAKING, THIS IS WESH 2 NEWS AT 11:00. I WAS THINKING, LIKE, WHY WOULD THIS HAPPEN? RIGHT NOW, A TRIPLE TRAGEDY ON CHRISTMAS DAY. A GUNMAN AMBUSHES AN APARTMENT IN PINE HILLS, KILLS ONE MAN, WOUNDS ANOTHER, THEN KILLS HIMSELF. GOOD EVENING. A UNIT ON 728 ROYAL LAKE CIRCLE WAS TARGETED. STEPHANIE HAS THE BREAKING INFORMATION FROM INVESTIGATORS. Reporter: DEPUTIES ARE STILL ON THE SCENE INVESTIGATING, ON WEST OAK APARTMENT COMPLEX. THE SHOOTER FIRST WENT TO THE FRONT DOOR, STARTED FIRING, THEN WENT TO THE WINDOW AND STARTED FIRING THROUGH THAT AS WELL. SHATTERED GLASS AND BULLET HOLES, EVIDENCE LEFT BEHIND AFTER A CHRISTMAS GATHERING INSIDE THIS APARTMENT ENDED IN GUNFIRE. DEPUTIES TELL US THE SHOOTER CAME TO THE FRONT DOOR OF THE APARTMENT AND STARTED FIRING. WHEN THE DOOR DID NOT OPEN, HE WENT TO THE WINDOW, FIRED MORE ROUNDS INTO THAT WINDOW, THEN BREAKING THE WINDOW. Reporter: THE GUNMEN ENTERED THE APARTMENT THROUGH THE WINDOW, AND SHOT TWO MEN INSIDE. ONE IS GOING TO BE OKAY; THE OTHER IS DEAD. THE GUNMAN THEN TOOK HIS OWN LIFE. A CHRISTMAS TRAGEDY THAT HAS THE ENTIRE APARTMENT COMPLEX SHAKEN. GARY OLIVER, JUST A TEEN HIMSELF, SAW ONE OF THE VICTIMS STUMBLE OUTSIDE. IT LOOKED LIKE HE GOT SHOT. IT WAS HARD TO TELL BECAUSE THERE WAS A WHOLE LOT OF BLOOD ON HIS ARM. I WAS TREMBLING. WHY WOULD THIS HAPPEN? THIS NEIGHBORHOOD IS NICE. Reporter: DEPUTIES TELL US TWO COUPLES LIVE INSIDE THE APARTMENT, BUT THEY'RE NOT RELEASING IDENTITIES TO US AT THIS TIME.